兵工学报：英文版
兵工學報：英文版
병공학보：영문판
Journal of China Ordnance
2011年
4期
243-247
,共5页
non-metallic inorganic material%expanded graphite%complex refractive index%Kramers-Kronig relation%effective medium theory
The expanded graphite （EG） with a low density and better extinction performance can be used in military as passive jamming material in IR and MMW bands. Its complex refractive index is a significant parameter for the extinction property. This paper presents a method to calculate the complex refractive index of EG. The reflection spectra of EG pellets were measured in the 0. 24 - 2.6 μm and 2.5 - 25 μm bands, respectively. Based on the measurement results, the complex refractive index of EG in 5 - 10 μm band was calculated by using Kramers-Kronig（K-K） relation and Bruggeman effective medium theory, and then the errors were analyzed. The results indicate that it is feasible to calculate the complex refractive index of EG based on its IR reflection spectra data.
